Wireless Device Timing Advance Configuration

Patent metadata

Field	Value
Publication number	US-2016112975-A1
Application number	US-201514966267-A
Country	US
Kind code	A1
Filing date	Dec 11, 2015
Priority date	Apr 1, 2012
Publication date	Apr 21, 2016
Grant date	—

Abstract

A base station transmits control message(s) comprising media access control dedicated parameters. The media access control dedicated parameters comprise a primary time alignment timer value for a primary cell group and a sequence of at least one element. Each element comprises a secondary time alignment timer value and a secondary cell group index. The secondary time alignment timer value is associated with the cell group identified by the secondary cell group index. Each secondary time alignment timer value is selected from a finite set of predetermined values.

First claim

What is claimed is:

1 . A method comprising:
transmitting, by a base station, at least one control message comprising:
configuration parameters of a plurality of cells grouped into a plurality of cell groups comprising a primary cell group and at least one secondary cell group; and
a plurality of media access control (MAC) dedicated parameters comprising:
a primary time alignment timer value for the primary cell group; and
a sequence of at least one element, an element in the at least one element comprising one secondary time alignment timer value and one secondary cell group index for a secondary cell group, wherein the one secondary time alignment timer value is associated with the secondary cell group identified by the one secondary cell group index, wherein the one secondary time alignment timer value is selected from a finite set of predetermined values;

transmitting a timing advance command comprising:
a time adjustment value; and
a cell group index; and
starting or restarting a first time alignment timer corresponding to a cell group identified by the cell group index.

2 . The method of claim 1 , wherein the timing advance command causes substantial alignment of reception timing of uplink signals in frames and subframes of one or more uplink carriers in the cell group at the base station, the uplink signals being transmitted by a wireless device.

3 . The method of claim 1 , wherein:
uplink transmission timing in the primary cell group is derived employing a first cell in the primary cell group; and uplink transmission timing in the secondary cell group is derived employing a second cell in the secondary cell group;

4 . The method of claim 1 , further comprising transmitting, by the base station, a control command configured to cause transmission of a random access preamble by the wireless device on random access resources of a secondary cell in the secondary cell group.

5 . The method of claim 4 , further comprising transmitting, by the base station to the wireless device and in response to receiving the random access preamble, a random access response on the primary cell, the random access response comprising:
a second timing advance command; an uplink grant; and an index identifying the random access preamble.

6 . The method of claim 1 , wherein the plurality of MAC dedicated parameters comprise a deactivation parameter for at least one secondary cell.

7 . The method of claim 1 , wherein the cell group is considered:
out-of-sync when the first time alignment timer is expired or not running; and in-sync when the first time alignment timer is running.

8 . A base station comprising:
one or more processors; and memory storing instructions that, when executed, cause the base station to:
transmit at least one control message comprising:
configuration parameters of a plurality of cells grouped into a plurality of cell groups comprising a primary cell group and at least one secondary cell group; and
a plurality of media access control (MAC) dedicated parameters comprising:
a primary time alignment timer value for the primary cell group; and
a sequence of at least one element, an element in the at least one element comprising one secondary time alignment timer value and one secondary cell group index for a secondary cell group, wherein the one secondary time alignment timer value is associated with the secondary cell group identified by the one secondary cell group index, wherein the one secondary time alignment timer value is selected from a finite set of predetermined values;

transmit a timing advance command comprising:
a time adjustment value; and
a cell group index; and

start or restart a first time alignment timer corresponding to a cell group identified by the cell group index.

9 . The base station of claim 8 , wherein the timing advance command causes substantial alignment of reception timing of uplink signals in frames and subframes of one or more uplink carriers in the cell group at the base station, the uplink signals being transmitted by the wireless device.

10 . The base station of claim 8 , wherein:
uplink transmission timing in the primary cell group is derived employing a first cell in the primary cell group; and uplink transmission timing in the secondary cell group is derived employing a second cell in the secondary cell group;

11 . The base station of claim 8 , wherein the instructions, when executed, cause said base station to transmit a control command configured to cause transmission of a random access preamble by the wireless device on random access resources of a secondary cell in the secondary cell group.

12 . The base station of claim 11 , wherein the instructions, when executed, cause said base station to transmit, to the wireless device and in response to receiving the random access preamble, a random access response on the primary cell, the random access response comprising:
a second timing advance command; an uplink grant; and an index identifying the random access preamble.

13 . The base station of claim 8 , wherein the plurality of MAC dedicated parameters comprise a deactivation parameter for at least one secondary cell.

14 . The base station of claim 8 , wherein the cell group is considered:
out-of-sync when the first time alignment timer is expired or not running; and in-sync when the first time alignment timer is running.

15 . A wireless device comprising:
one or more processors; and memory storing instructions that, when executed, cause said wireless device to:
receive at least one control message comprising:
configuration parameters of a plurality of cells grouped into a plurality of cell groups comprising a primary cell group and at least one secondary cell group; and
a plurality of media access control (MAC) dedicated parameters comprising:
a primary time alignment timer value for the primary cell group; and
a sequence of at least one element, an element in the at least one element comprising one secondary time alignment timer value and one secondary cell group index for a secondary cell group, wherein the one secondary time alignment timer value is associated with the secondary cell group identified by the one secondary cell group index, wherein the one secondary time alignment timer value is selected from a finite set of predetermined values;

receive a timing advance command comprising:
a time adjustment value; and
a cell group index; and

starting or restarting a first time alignment timer corresponding to a cell group identified by the cell group index.

16 . The wireless device of claim 15 , wherein the timing advance command causes substantial alignment of reception timing of uplink signals in frames and subframes of one or more uplink carriers in the cell group at the base station, the uplink signals being transmitted by the wireless device.

17 . The wireless device of claim 15 , wherein:
uplink transmission timing in the primary cell group is derived employing a first cell in the primary cell group; and uplink transmission timing in the secondary cell group is derived employing a second cell in the secondary cell group;

18 . The wireless device of claim 15 , wherein the instructions, when executed, cause said wireless device to receive a control command configured to cause transmission of a random access preamble by the wireless device on random access resources of a secondary cell in the secondary cell group.

19 . The wireless device of claim 18 , wherein the instructio

Assignees

• Dinan Esmael Hejazi
• Ofinno Technologies Llc

Inventors

• Dinan Esmael Hejazi

Classifications

• H04W72/53

  based on regulatory allocation policies · CPC title

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title

• H04W56/001 Primary

  Synchronization between nodes · CPC title

• H04W72/0493

  Electricity · mapped topic

• H04W56/0045

  compensating for timing error by altering transmission time · CPC title